Support for commutator-leads.



A E. MATTMAN.- SUPPORT PoR COMMUTATQR LEADS. lAPPLICATION FILED JAN.1, 1907.

932,042. 'patented Aug. 24, 1909.

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AMX MMM/nvm 7%( .UNITED sTATns yrroN or NEW JERSEY, AND --PoRATIoN or orne.

THE BULLOCK ELECTRIC MANUFACTURING SUPPORT FOR COMMUTATGReLEAD Specification of Letters Patent. Application :filed anuary 31, 1907.

Patented Aug. 24', 1.909. Serial No. 355,018.

To all whom it may camera: a

Be it known that I, EME. MATTMAN, citizen of theRepublic of Switzerland, residing 'at`NorWood, in the county of Hamilton and 'State of Ohio, have invented certain new and useful Improvements in Supports for Commutatorelreads, oir' which the following is a full, clear, and exact specification.

My invention relates to the rotary members of dynamo-'electric machines of the lcommutator type, suoli as direct-current machines and rotary converters, and particularly to large units having long commutator A.necks or leads.

In machines of the direct-current type itisnecessary to provide-retaining means for -theportions of the coils which project beyond each end of the'armature core. In nearly all machines except very high speed :.and'very large machines, the end portions of Ithe coils are retained-in-position by band Wire. Vhen' the diameter of the rotary member exceeds a certain amount, band Wire can not be relied upon for this purpose, but the coils must be held position by other means. v

The rotary members of large units frequently 4have very long commutator necks or leads. These leads arel heavy and conse- SOfguently the =tions of the coils in place.

combined centrifugal forces acting upon the commutator necks and coils at thecommutator end of the machine are considerable. These centrifugal forces are resisted by the joints or connections `between the commutator bars and necks, Aand by the means provided 'for retaining the end por- Consequently there is considerable strain-upon said joints or connections, While for obvious\reasons such strain should be as small as possible.

One of the bestmeans for counteracting the effects of centrifugal force acting upon -the endsof the coils and the commutator necks, when band Wire cannot be employed, islby clamping devices disclosed in U. S. Patent to-Behrend #792,568, June 13, 1905. As-'shown in this patent the coils vrest on endsheadsand the clamps are heldin position2.by'screvvs or bolts passing between the coils into-the end-heads. Thismeans can generally be employed in large units and is very effective. ln those machines, having very closely spaced slots iductors, clamps cannot well beand4 conemployed.

' at the commutator ends of the machines. for

the reason that the conductors cannot be spread apart suiiiciently to permit the insertion of the holding screws or bolts.

One of the objects of my invention isfto provide means for overcoming or counteracting the eifect of the centrifugal forces acting' upon the long and heavy commutator necks and the ends of the coils connected thereto, so that the strain upon the commutator joints or connections, and upon the coil retaining means, if any should be employed, -Will be lessened. By thus partially overcoming `the effect ot' thel centrifugal forces, the coils can be easily retained in position by some means, such as band Wire, which alone could not be relied on.

A further object is to provide means-for supporting and bracing the commutator necks so that vibration in said necks Willbe eliminated.

In carrying out my inve'ntionll support the commutator necks between their ends in such a manner that the effects of centrifugal force at the commutator necks and coils.at the commutator end of the machine are wholly tion in the necks is reduced or eliminated.

The commutator necks are preferably supported on the end-head at the end of the core on which the ends-ofthe coils rest. The endhead in this instance annular flange or projection which engages a. shouldered portion on the commutator necks, the shoulders being formed/.in this case by notches which receive the annular flange. The necks are carefullyy .insulated from the supporting member an may be Aheld tightlyin engagement therewi h in any desired manner. In this case, as Willbe ex plained, the necks are held tothe iiangeby an insulating sectional clamping ringand screws which pass through theclamping ring between the necks andintothe iange of the supporting end-member.

My invention further consists in certain novel details of construction and: the combi* vnations and arrangements of .parts described in the specification and setforth-inftheappended claims.

In the drawing Figure l is an? end elevation ot a large rotary'member eqnippedwith of the machine EignZ 1s fa. longitudinal COMPANY, Af COR- or partially overcome, and the vibraf my invention, showt-ng the commutaton end Y is provided With-.an

esspfis l enge o1' projection engaging lie shouldered. portions of the necks and an insulaing annular eleinpine' meinbei' for holding Tthe necks end end-member in engagement- S. ln e clynsmo-eleere machine, an amneiue ooe, an encl-nembe, swncling een iiel by seid eoi'e and niojee'ing ovel' seid enel member, a eomniuteo, and eonn'nutzioi necks connecting the conductors of the winel ing and ille mas 0:5 elle eonnnnator', said necks having recessed o1 noehecl portions between their ends, and said enclmenibe having an annnlai flange 01' projection entne shouldered pot-ions of lie necks.

lin a dynamo-electric machine, an erniatuie oue, en end-member, e Winding eemiecl by seid. ooe

and pyojeeing over seid endy membei', a comuni-stel; eonimntato: neck*y oonneeing the conductors of the W having ree-esse@` o?? notehed portions beween ineling sind the oeps the eonninizto: said necks their ends, said end-member having an ennular flange or piojeetion engaging the Eecessefl portions of the necks, and an annular clamping member on the outer edges o ssi l necks for holding ille leiser and the end memberin en regeln en 8. :in clpismoeleore machine, en ernieuie, coinmnetoi, coinmua'toi necks each having; shoulxilerel portions on elle inner and enthe lie ouei edges, e rigid suppofaing nienioe gaging the inner shouldered porions of necks, and an exernel clamping ring gagging the onfer shoulders@ potons of necks. v

In testimony. whereof affix my sgneure, in 4:he piesence of two Wiinesses.

l/'inesses ARTHUR F. KWIS, FRED J'. l'msm'. 

